An Experimental Study on the Influence of Steel Rod Corrosion in Concrete Cracks

Abstract:

The purpose of this study is to define the amount of critical corrosion in steel that causes cracks on the cover of concrete. Major variables in the amount of critical corrosion are concrete strength, thickness, and the cover of concrete. In this experiment, stress concentration is a newly added factor. According to the results of this experiment, it is evident that the amount of critical corrosion decreased according to the increase in stress concentration factors. In addition, electric currents were measured using a constant voltage generator. When a constant voltage was connected to the corrosion circuits, it was discovered that the magnitude in the change was similar to the displacement on the cover of concrete and the electric current according to time.1)

• Periodical: Key Engineering Materials (Volumes 348-349)
• Pages: 773-776
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.348-349.773
• Online since: September 2007
• Authors: Hai Moon Jung, Han Seung Lee
• Keywords: Concrete Cover Cracking, Corrosion in Steel Bars, Critical Corrosion, Stress Concentration Factor (SCF)

References

[1] H. S. Lee et. al. 1999. A study on the generation of concrete cracks caused by steel bar corrosion. J. of the Korea Concrete Institute. p.771～774.

[2] Liu, Y. and Weyers, R. E, (1998), Modeling the Time-to Corrosion Cracking in Chloride Contaminated Reinforced Concrete Structure., ACI Mat. J., 95(6), p.675～681.

DOI: 10.14359/410

[3] M. S. Paek. 1997. Crack behavior of concrete caused by steel bar corrosion. J. of the Korea Architecture Institute. Vol. 13, p.253～258.